I found one that leaves at 05:21 would that work for you?
Well, I need to arrive by 16:45, and want to depart from Cambridge. Does that one match my request?
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attraction-area attraction-type train-arriveby train-day train-departure train-destination
attraction-area attraction-name attraction-type train-arriveby train-day train-departure train-destination
attraction-area attraction-type train-arriveby train-day train-departure train-destination